10 results about "Aortic stent" patented technology

The present disclosure provides a stent for an aorta, the stent having a longitudinal axis defined between a first end and a second end of the stent. In the radially expanded state, the second end has an oval cross-sectional shape in a plane perpendicular to the longitudinal axis. The stent comprises first and second radiopaque markers. There is also provided a stent system comprising the stent for an aorta as a first stent, and a second stent for crossing over the common iliac arteries. The second stent has an aperture between its first and second ends, and the first stent is configured to couple to the second stent. A method of implanting the stent is provided. A method of implanting the stent system is also provided.

The internal leakage prevention structure comprises a plurality of separation blade single bodies arranged on the outer surface of the covered stent, each separation blade single body comprises a separation blade main body and a supporting wire, the separation blade main body is in a blade shape or a flipper shape, a roughening structure is arranged on the surface of the separation blade main body, and the supporting wire is arranged on the surface of the separation blade main body. One end of the support wire is connected with the catch main body, and the other end of the support wire is fixedly connected with the covered stent; a certain included angle is formed between the blocking piece single bodies and the side wall of the covered stent, part of the blocking piece single bodies are arranged around a pre-windowing hole of the covered stent, the rest of the blocking piece single bodies are arranged on the outer surface of the covered stent in a multi-position scattered mode, and the multiple blocking piece single bodies integrally form a breakwater-shaped structure. After the speed of leaked blood flow is reduced, thrombus is slowly generated, the leaked blood flow is naturally blocked, and therefore the probability of internal leakage is reduced.

The utility model discloses an aorta abdominalis covered stent and a stent system, and belongs to the technical field of aorta abdominalis covered stents. The utility model provides an aorta abdominalis covered stent which comprises a stent body, and a first through hole, a second through hole and a third through hole are formed in the stent body in the longitudinal direction of a cylinder. The middle section of the support body is provided with an open groove, the second through hole and the third through hole are broken through the open groove, and the first through hole is not broken through the open groove. Therefore, according to the aorta abdominalis covered stent, the aorta abdominalis stent can be communicated with the four branch arteries. The first through hole is not affected by the open groove and penetrates through the stent body, and therefore it can be guaranteed that blood in the aorta abdominalis is smooth all the time. The slotting does not need to be customized according to the condition of a patient, and professional batch production can be realized, so that the manufacturing efficiency and the use reliability are improved.

The application relates to an aortic stent and a manufacturing method thereof. The manufacturing method of the aortic stent comprises the following steps: providing a proximal stent section for being implanted into a descending aorta, a distal stent section for being implanted into an ascending aorta, and an arch stent section for being implanted into an aortic arch; providing a foldable covering film; covering the covering film on the proximal stent section and the distal stent section; providing a keel line with a pre-bent shape; and penetrating the keel line through the proximal stent section, the arch stent section and the distal stent section; wherein the proximal stent section, the arch stent section and the distal stent section jointly define a supporting cavity, the covering film is foldable, and the keel line has the pre-bent shape. The whole stent can be bent along the bending direction of the keel line, so that the elastic straightening force of the aortic stent itself can be reduced, the flexibility of the aortic stent is improved, and the complications caused by poor adhesion are reduced.

Devices, systems, and methods for patient-specific, custom-designed fenestrated implants. Various examples involve abdominal aortic stent-grafts with custom-designed fenestration features for perfusion of the renal arteries, mesenteric arteries, and / or celiac trunk arteries.

The present application relates to cardiovascular disease medical equipment technical field, disclose a kind of aortic covered stent, the aortic covered stent includes support stent, closure layer and elastic connecting layer, closure layer is spaced apart and is set to the outer periphery of support stent, closure layer includes first covering, elastic connecting layer is connected between support stent and closure layer, blood flow can flow between support stent and closure layer;With aortic pulsation, closure layer and elastic connecting layer produce elastic deformation, so that first covering is always close to aortic and the blood vessel wall adjacent to closure layer.The aortic covered stent can be better applied to the special form of ascending aortic dissection and the mechanical characteristics of blood flow, higher stability, better closure for ascending aortic wall.

The invention relates to a stent for placement at an aortic annulus that is expandable from an undeployed state to a deployed state comprising a stent frame having rows of cells with a proximal section and a distal section at a longitudinal axis of the stent, the stent frame being formed by a plurality of arms, the arms being connected to one another at connection points, and wherein the plurality of arms forms a plurality of diamond-shaped stent cells, in particular the rows of cells, formed of vertices at said connection points between the arms, a dry valve made out bovine pericardium arranged at least at the distal section of the stent with the dry bovine pericardium being configured to be rehydrated with a solution, a skirt surrounding the dry valve and comprising at least one of bovine pericardium and polyester, and one or more eyelets arranged at a distal end of some of the arms, with the eyelets being configured to fix the valve to the stent frame.

This invention relates to an in-situ vascular puncture sheath, comprising a hollow tube body. The hollow tube body has two corresponding side holes on its two opposite sidewalls near its front end, each hole penetrating the inner and outer surfaces of the tube body in the same radial direction. Each side hole also has a lateral slit at its front end, connecting to the side hole and extending forward. The two slits, starting from the top of the front end of the side hole and extending forward, gradually slope towards the same side of the hollow tube wall until they merge to form a guidewire release slit, facilitating guidewire disengagement from the hollow tube body. The opening width of the lateral slit and the guidewire release slit is equal to or slightly larger than the diameter of the guidewire used to pass through the two side holes. By positioning the side holes of the in-situ vascular puncture sheath at the branch vessel opening using a guidewire, in-situ puncture and fenestration of the aortic stent graft at the branch vessel opening can be performed through the opposite side hole. This method offers advantages such as accurate fenestration positioning, convenient surgical operation, and avoidance of arterial damage.

The application discloses a kind of aortic stent plane automatic positioning and related index measurement method. Obtain postoperative patient three-dimensional medical image data and carry out standardization processing;Identify and segment aortic stent and its related anatomical structure, extract stent three-dimensional point set;Determine horizontal reference plane and longitudinal reference plane based on point cloud spatial distribution, and position stent bottom / top plane accordingly;Combine coronary artery opening position to construct coronary plane, generate parallel section between stent bottom plane and coronary reference plane and determine Waldeyer's sinus plane;The intersection of the plane and image data obtains two-dimensional section, calculates the area, perimeter and other geometric indexes of stent and aortic section and outputs result.The method realizes postoperative key plane automatic positioning and quantitative measurement, improves evaluation efficiency and consistency.

A main stent-graft (22) is provided that includes an internal support channel (120) disposed within a generally tubular main fluid flow guide (28). When the internal support channel (120) is in a collapsed state, a distal channel-fluid-flow guide end opening (127B) of a channel fluid flow guide (128) faces radially inward. When the internal support channel (120) is in an expanded state and the main stent-graft (22) is in a radially-expanded deployment state, the distal channel-fluid-flow guide end opening (127B) faces at least partially distally within the main fluid flow guide (28). An elongate member (160A, 160B) is removably positioned passing sequentially through (a) a proximal main-fluid-flow guide end opening (27A), (b) a longitudinal portion (142) of a main fluid flow lumen (29) of the main-stent-graft fluid flow guide (28), (c) the distal channel-fluid-flow guide end opening (127B), and (d) a main-fluid-flow guide lateral opening (30) to outside the main fluid flow lumen (29). Other embodiments are also described.